prosopagnosia - Definitions from Dictionary.com

American Heritage Stedman's Medical Dictionary - Cite This Source

pros·o·pag·no·sia (prs-pg-nzh, -z-)
n.

An inability or difficulty in recognizing familiar faces; it may be congenital or result from injury or disease of the brain.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Merriam-Webster's Medical Dictionary - Cite This Source

Main Entry: pros·op·ag·no·sia
Pronunciation: "präs-&p-ag-'nO-zh&
Function: noun
: a form of visual agnosia characterized by an inability to recognize faces

Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.

On-line Medical Dictionary - Cite This Source

prosopagnosia

prosopagnosia: in CancerWEB's On-line Medical Dictionary

On-line Medical Dictionary, © 1997-98 Academic Medical Publishing & CancerWEB

Prosopagnosia Links

http://www.answers.com/topic/prosopagnosia
General Reference site.

http://en.wikipedia.org/wiki/Prosopagnosia
General Reference site.

http://www.choisser.com/faceblind/
Face blind book written by Bill Choisser, is a prosopagnosic from birth.

http://www.prosopagnosia.com/main/stones/index.asp
This site has a brilliant metaphor for face blindness which uses stones instead of faces. Many prosopagnosics really relate to this article.